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1988MNRAS.232..793G - Mon. Not. R. Astron. Soc., 232, 793-808 (1988)
X-ray and ultraviolet observations of Markarian 421.
GEORGE I.M., WARWICK R.S. and BROMAGE G.E.
Journal keyword(s):
Errata: + erratum vol 234, 799
Simbad objects: 1
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